Different Results from SQL-Query in Oracle 10.2 and Oracle 11.2

Question

Look at the following example:
CREATE TABLE GZP_PLAN (GZP_ID
NUMBER(9) NOT NULL, PARENT_GZP_ID NUMBER(9),
CONSTRAINT GZP_PLAN_PK1 PRIMARY KEY(GZP_ID)
USING INDEX
TABLESPACE USERS
TABLESPACE USERS;
insert into GZP_PLAN values(1,NULL);
CREATE TABLE GZP_WB (OBJECTID NUMBER
NOT NULL, GZP_ID NUMBER(10),
CONSTRAINT GZP_WB_PK1_1 PRIMARY KEY(OBJECTID)
USING INDEX
TABLESPACE USERS
TABLESPACE USERS;
insert into GZP_WB values(1,1);
CREATE OR REPLACE VIEW VW_GZP (GZP_ID1) AS
SELECT xxx.gzp_id
FROM gzp_plan xxx
WHERE gzp_id IN (
SELECT MAX (z.gzp_id) zzz
FROM gzp_plan z
START WITH z.gzp_id = xxx.gzp_id
CONNECT BY PRIOR gzp_id = parent_gzp_id);
-- query
select a.* from GZP_WB a where gzp_id in (select gzp_id1 from vw_gzp);
Result in Oracle 10.2. (Windows Server 2003 32-bit, Oracle 10.2.0.2 or Oracle 10.2.0.5, Enterprise Edition)
OBJECTID     GZP_ID
*1 1*
Result in Oracle 11.2 (Windows Server 2008 64-bit, Oralcle 11.2.0.2, Enterprise Edition or Standard Edition One)
no rows selected
The result of the following queries are identical in Oracle 10.2 and 11.2
SQL> select * from GZP_WB where to_char(gzp_id) in
2 (select to_char(gzp_id1) from vw_gzp);
OBJECTID GZP_ID
1 1
SQL>
SQL> select a.* from GZP_WB a, vw_gzp b where a.gzp_id=b.gzp_id1;
OBJECTID GZP_ID
1 1

Answer 1

The solution is Oracle 11.2.0.3 - patchset released 11th November.